"Chackma," a bear with a zipper on its belly, is a "Chack race" from a "Chack world" somewhere. Their job is to pick up trash. They go to various worlds, pick up trash, and put it in the zipper on Their belly. The garbage they put in will disappear somewhere. However, only the Chackma's zipper is a mysterious zipper where various things come out. There is always an incident happening when something pops out.